I am the author of shatter glass and mind of Npc...
I couldn't reply to you on ky profile so here I am.
The problem that happened with shatter glass was me being incapable of writing the dialogue, I was able to write singular scenes of desperation perfectly. But scenes with multiple characters caused me to suffer a bit.
As for future of shatter glass.. its up for debates as the concept itself has lived on in the form of mu new novel.